\(-\frac{1}{2}\)
\(-\frac{\sqrt{3}}{2}\)
\(\frac{1}{2}\)
\(\frac{\sqrt{2}}{2}\)
\(\frac{\sqrt{3}}{2}\)
Correct answer is A
sin 210 = - sin (210 - 180) = - sin 30
= \(-\frac{1}{2}\)
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